Substitute llvm_asm!(deprecated) with asm!

[wyfcyx]

The feature llvm_asm has been deprecated in the newest Rust nightly channel. Therefore, we should remove the llvm_asm feature and replace all the llvm_asm! with asm! to keep up with Rust. By the way, macros.rs is from the upstream.

[wangrunji0408]

LGTM

[x931890193]

hey man:
it is not cool for me!

 Finished dev [unoptimized + debuginfo] target(s) in 0.00s
Targets: hello_world notebook
Image resized.
   Compiling bitvec v0.22.3
   Compiling riscv v0.6.0 (https://github.com/rcore-os/riscv#11d43cf7)
error[E0433]: failed to resolve: could not find `asm` in `arch`
  --> /Users/sato/.cargo/git/checkouts/riscv-ab2abd16c438337b/11d43cf/src/asm.rs:10:35
   |
10 |                   () => core::arch::asm!($asm),
   |                                     ^^^ could not find `asm` in `arch`
...
28 | / instruction!(
29 | |     /// `EBREAK` instruction wrapper
30 | |     ///
31 | |     /// Generates a breakpoint exception.
32 | |     , ebreak, "ebreak", __ebreak);
   | |__________________________________- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `asm` in `arch`
  --> /Users/sato/.cargo/git/checkouts/riscv-ab2abd16c438337b/11d43cf/src/asm.rs:10:35
   |
10 |                   () => core::arch::asm!($asm),
   |                                     ^^^ could not find `asm` in `arch`
...
33 | / instruction!(
34 | |     /// `WFI` instruction wrapper
35 | |     ///
36 | |     /// Provides a hint to the implementation that the current hart can be stalled until an interrupt might need servicing.
37 | |     /// The WFI instruction is just a hint, and a legal implementation is to implement WFI as a NOP.
38 | |     , wfi, "wfi", __wfi);
   | |_________________________- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

[wangrunji0408]

Hi @x931890193, it seems that your Rust toolchain is outdated. Try to update by rustup update nightly.